Tom Anderson observed that the unit cost for a particular cost (cost # 101) increased in February compared to January of this year. He further observed that the total cost for cost # 101 was higher in January compared to February. All other things being equal, which of the following is most likely true?

A. Cost # 101 is a mixed cost and the volume of activity has decreased in February compared to January B. Cost # 101 is a fixed cost and the volume of activity in February is the same as in January C. Cost # 101 is a mixed cost and the volume of activity has increased in February compared to January D. Cost # 101 is a fixed cost and the volume of activity has increased in February compared to January E. Cost # 101 is a variable cost and the volume of activity has increased in February compared to January